TECH GURU's out there, how to clean Circuit Board?

Eldartford, I used the name contact cleaner as a generic name, my mistake. I brought the can in and here is the info. The brand is Chemsearch, the can says Lexite PS, Electrical Cleaner Dergreaser, the label states "safe on plastic, rubber and plastic - no residue - no disassembly required." I have used this on circuit boards repeatedly to remove residue from spills, leaky caps and rodent urine and fecal matter (disgusting). This stuff works pretty well without harming boards. Given time it may cause some deterioration but I haven't noticed it. The residue is probably more harmful than the chemical.
Now I recommend first cleaning the affected area with denatured alcohol and a brush and then spraying the cleaner. That's how I do it. Good luck.

Thank you everyone, Bombaywalla and all of you out there!
Very knowledgeble people and this is why I like forums such as these, very educational and helpful.

I used all your advise, paid $10 for the unlta wash from Radio Shack, $4 for brushes from the dollar store, cut the brshes up to enhance the stiffness and control .5 inch sprayed over the brush and cleaned process, never sprayed directly to the board only on some empty areas than needed.
Used a little alcohol or some areas with cotton swab and too my time and cleaned it up good. WORKED!
Images enclosed:

Believe me the board was originally brown in colour with dirt all over.... like the lable shown with the serial board #####, NOW ITS GREEN as original... Thank you very much. First 2 images shows cleaned board, last shows the cleaner I used, I also used rubbing alcohol or certain stuborn areas very little and with caution.

http://img.photobucket.com/albums/v430/rainbowrav/closer2.jpg

http://img.photobucket.com/albums/v430/rainbowrav/closer.jpg

http://img.photobucket.com/albums/v430/rainbowrav/worked.jpg

Looks good as new in pics. Kudos on a job well done!

thanks again on the feedback, Rapogee. looks like a job well done by yourself!